What you describe as toptube distance from the floor is commonly referred to as standover height, which the seller has listed as 34".
Given that you want to leave at least an inch or two for your sensitive bits, this would mean that you'd need a 36" inside leg.
For someone of your height, I'd give this one a miss, as even if you were ok in the leg length department, you'd then most likely find the reach to the bars too much.