If I got a breast reduction surgery, how many pounds would be taken off my breasts?

I'm 15 126lb 4'9 and have 38DD breasts. I have terrible back, shoulder and neck pain and I get a lot of unwanted attention from boys and middle aged men and I have gotten bullied by other girls. I've tried excersisng and I lost a couple of pounds but that made my back hurt worse and my breast didn't change just started to sag. I'm in a lot of physical and emotional pain. If I were to get the surgery how many pounds would be removed from each breast??