Hi Kuba, Yes I think its possible, you can use Traktor with your XDJ-700's in HID mode BUT you need some custom mappings (Traktor Bible may help), as XDJ700's are not officialy supported by Native. If you're playing with pendrives and want to use traktor just as a 'sampler' with your f1, I guess you can sync traktor to the DJM midi clock out. Beware that the bpm reading on the djm isn't always very precise.
Unfortunately I don't have neither the djm750mk2 or the xdj700, so I can't help you with more details on the setup.