Your frame is most likely spaced 126 mm since it is 7-speed. It will have to fit a 130mm OLD (over locknut dimension) hub to accept any cassette above 8-speed and you can't safely cold set (i.e. bend) an aluminum frame. Also, 11-speed is going to require nearly everything new, including wheels, derailleurs, shifters, chain, crank, cassette and the saddle and brakes you already plan to replace even if you can cram the wider hub into the frame.