Option 1: Change the Dots per Inch (DPI) of your scanner to be at most 600x600. Because settings are different for every scanner, you will have to search for “Change DPI on scanner name” if you do not know how to do that.
Option 2: Use Adobe Scan. Here’s the directions for installing it.
https://fpeusa.freshdesk.com/support/solutions/articles/43000663237