If you must, lowering your bike requires this:
For the rear, either purchasing shorter rear shocks, moving the top mounting points forward, or both. You could use lowering blocks, but those are wonkey.
For the front, either just move the tubes up in the triple tree, or purchase shorter stanchion tubes and order custom springs from like, hagon, or works, or something like that. Come to think of it, a 550 front end would work, with 550 springs. Should be able to fit the 750 front wheel to them, if you just throw the 550 forks into the 750 triples.