I'm 5'6", I weigh 170 pounds. I wanted 1400 ccs in each cheek. Is it an achievable goal? Do I have enough body fat for a BBL?

Hello dear!
Thanks for the question and provided information as well.
Your BMI is within the recommended range, but unfortunately, without pictures, it is very difficult to give you a proper answer.
In general, you need to be physically healthy and at a stable weight, have realistic expectations, be a non-smoker and your BMI needs to be 30 or less.
l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)

It looks possible, but best determined during a consult. I routinely transfer between 1200 to 1800 cc to each side. It depends on multiple factors and your size.