Power is easy, the 750 is gonna be stronger everywhere. It should be a pretty good match. The B6 suspension and wheels are better/stronger than the early 86-87 GSXR pieces and should handle the power. As far as fitiment, its guess work. There are a few 7/11 sites that go into detail on fitting a GSXR1100 motor into the 750 frame. There might be useful info there.
Expect unforseen problems, but I am sure it can be done.
Good Luck, Ed.
2005 GSF1200SZ
1983 GS750ED