900mL of water
The XP 75 is a 1994 XP Super Soaker that holds 900mL of water. It is no longer available. It is an Air Blaster, and was the first in a long line of XP guns. It was rereleased in 1998, this time sporting a new tank that holds 1.3L of water, and a half-twist locking capability of the tank.
"The 75 Blow-Out"
The XP 75 is controversial for it's "blow-out". If pumped too many times, the reservoir will shoot out of place. The 1998 version retained the blowout feature.