I typically get my stats from Sports Reference. For Iowa last year the link is:
https://www.sports-reference.com/cbb/schools/iowa/2018.html
And the 755 is a little more than average. It would rank #129 out of the 351 D1 schools. Iowa, to contrast that took 672 three point shots last year, putting them at #222. We gave up 37.6% and shot 37.5%, so that's a wash. If you look at the difference in three point shots over our 33 games, it comes out to 83, which is 2.5 more three point shots per game for our opponents. So at best our opponents made one more three point shot per game than we did.
Just to make us feel bad, Villanova shot 1158 three point shots last year (#2) and shot it at 40.1% (#11).