Roughly 500cc's in each cheek. 1 day post BBL, can 500cc make a difference?

If you have an average amount of fat, 1000 cc to 1500 cc per buttock can usually be injected.Kenneth Hughes, MDLA

It's difficult to say without seeing preoperative photos. The difference that 500 cc will make really depends on the size and shape of your buttocks before surgery. Remember that about 50% of the fat will be reabsorbed by your body, so he should be left with about 250 cc. Also, the liposuction will do a great job of shaping your buttocks by removing fat from your waist, love handle area, and the V-shaped area at the top of your buttocks. Continue to be patient with the healing process and give yourself 2-3 months to judge your final results.

Dear SMJ2006,it is hard to tell without an examination. The results will depend on your anatomy, size of your buttocks prior to surgery, your goal, etc.  In case you are concerned, I would suggest you to discuss this with your plastic surgeon. Only after a thorough examination you will get more information and recommendations.Daniel Barrett, MD, MHA, MS 
Certified, American Board of Plastic Surgery  
Member, Am. Society of Plastic Surgery

It is more important that the overall appearance was achieved.  Hope you have a great recovery and no other issues.

Without pictures to see your build and body type, it's not 100% possible to say what is appropriate for you. The general rule of thumb is above 300 cc is needed per side to make an adequate change. This all depends on your size and your goals. 500 cc is plenty for many patients but often more can be done safely. Too much fat transfer can lead to problems such as significant fat loss, fluid, infection, etc.Discussion of your goals with your surgeon is very important.

500 mL would be a small amount for large person but may be sufficient for someone more petite.
It's fairly conservative as a general number in my opinion.
For some people 500 mL that are well-placed can make a nice enhancement.
Best,
Mats Hagstrom M.D.