Yeah, generally you want to suck the hot air out of the place it tends to collect. So if you can do an exhaust fan in a hot room and an intake in a cooler room, you'll get the air flowing through and push the hot air out and replace it with cooler air.

Though the other key is to make sure that in the morning, you make sure you shut off the intake before it gets too hot. (While shuttering up entirely probably does keep the temp down better, I find it's easier for me to just leave the exhaust on even if it's hot outside, so there's some airflow, but ymmv?)