Hi mudkip, how about an Arctic Cooling Freezer 13
4 heatpipes and 92mm PWM fan, I had one on my i7-2600K for a while and it could cool it pretty quietly under load and certainly very quiet idle. Also a limited edition gray/black one.
It struggled once I started on the over-clocking though, needing noisy 1800~2000rpm to cool fully loaded chip in th 4.5~4.6GHz range.
Would think it will be just fine on i5-750, unless you over-clock it heavily. Maybe look for other 92mm fan tower coolers, some other should fit in your height restriction, or a Scythe Big Shuriken.
Within your height restriction, short of water cooling, I suggest the ultimate will be a Noctua NH-C14
in low-profile mode. This is a rather expensive solution, especially if want PWM fan(s) as well. My experience with it in narrow case is better noise and motherboard cooling with the fan(s) blowing away from the motherboard.
Good luck, Seb