And now for the math....
7.5 x 3.5 x 1.75 = 45.9375 cubic inches.
45.9375 x 0.5541126 = 25.4545455 Ounces (U.S. Liquid)
Or, if you don't happen to reside in the US...
45.9375 x 0.576744 = 26.4941787 Ounces (U.K. Liquid)
Or, for those who prefer metric...
19 x 8.9 x 4.4 = 744.04 cubic centimeters or milliliters (since cubic centimeters are equivilent to milliliters.)
Pretty darn close to 3/4 of a liter.
...jim