I guess your real question was if that filter would be enough. I'm not familiar with them but I assume its rated for a 90g tank. I think that would "be enough" (depending on your stock and bio load) but most people like to filter at twice the tank rating. So for a 75g, would mean having filtration rated for 150g.
I'm not sure what the gph
ratio is so someone else may want to chime in.