easy conversions: 12 inches in a foot. for cubic feet you need to go this route:
you can only change the width, so, for out purposes we will call width W. Hell, call it what you want, and after you get done talking to it, plug it into this equation: W*14inches*13inches = 1.7 ft^3.
whoa. you got inches in that equation. we need it all in cubic feet. No problem, up at the top we have that conversion figure. so 14inches * 1ft / 12 inches = 14/12 feet or 1.1667 feet. 13 inches * 1ft/12 inches = 1.0833.
so, we have now W*1.667*1.0833 = 1.7ft^3. simplifies that to 1.2639*w = 1.7
so W = 1.7 / 1.2639 which is 1.3451ft
wow. not too shabby, now all you need is that in inches and we are good to go
we have 12 inches / 1ft * 1.3451 ft the ft cancell out leaving inches, and that gives us 16.1407 inches.
and that I believe is within your specs.