How many CC's should I expect to get for my Brazilian Butt Lift with Vaser Lipo? (Photo)

I'm having a BBL procedure scheduled in January. I currently weight 106lbs and I'm 5'0". I carry most of my excess fat in my abdomen and flanks. I'm hoping to transfer about 400cc to each side. My surgeon says it's doable but that would likely be the max I could realistically harvest. Minimum would be 250cc. In order to maximize the amount of fat for transfer, I'm having Vaser lipo done of my abdomen, flanks, lower back, and upper back. Does this sound like a reasonable option for me? Thanks