Bears typically look much much bigger than they are. This one is def heavy for it's size. The belly is almost dragging a sign of an easy food source. Seen very often in cornfield bears by me. Looks like a make only because it seems from pic his right ear has been bitten off in a fight. His ears though look big and giant males typically get a big crease in the center of the head from muscle on the skull. The hair looks parted. Also keep in mind when alive a bears hair sticks out substantially. Ask a new bear hunter about ground shrinkage. Basically it's the hair lying flat after it died.
Imagine how big a 550 pound man is, cover him on all sides w long dense fur and you get an idea how big 550 is. Not at all saying you are wrong, it's hard to tell without anything in the background but I'd guess some less
