Is it possible to surgically implant 750 cc breast implants on the first surgery?

Thank you for sharing your excellent question.  For the majority of patients placement of a 750cc implant is not advised, nor possible, based on their anatomy.  There are some patients who have a wide chest, or loose skin, that may be able to accomodate this size implant, but they are few and far between.  Hope this helps.

Thank you for the thoughtful question.  There are many variables that come into play when determining the specific aesthetic outcome achieved with breast augmentation surgery.  The patient's starting point, for example will determine to a great degree what can be achieved but surgical maneuvers can also play a significant role.  Exactly how/where the breast implant "pocket" is dissected and which breast implant size/profile is selected may play a big role when it comes to final aesthetic outcome achieved. 
Generally speaking, every patient undergoing breast augmentation surgery should understand that their anatomic starting point will limit the outcome of breast augmentation surgery.    In other words, a patient's starting anatomy will limit how large of a breast implant can be utilized safely. The use of a larger breast implant (than what is safely "allowed" by the patient's anatomy) can be problematic;  potential problems include breast implant displacement/malpostion issues ( such as bottoming out, lateral displacement, symmastia...)  and/or significant breast implant rippling/palpability.
 My best suggestion: select your plastic surgeon carefully. Make sure that he/she is a board-certified plastic surgeon who can demonstrate significant experience achieving the types of outcomes you would be pleased with. Then, communicate your goals carefully as well.  The use of goal photographs and computer image may be very helpful during the communication process. After doing so, your plastic surgeon will be able to tell you whether or not the desired outcome is realistic, given your specific anatomic starting point.
 Best wishes.