Macro cannot hide rows based on cell linked to checkbox

I cannot get my macro to hide rows based on the value of a cell linked to a check box. I got a macro to work when typing directly into a cell, but cannot get it to hide rows when a cell value is updated based on whether a check box is checked or not. So, if the check box is checked, the value in the linked cell becomes TRUE. Here's the code I used to hide a range of rows when typing the word TRUE directly in a cell:

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Can this be modified to work with a cell value based on a formula? I'm a novice with VBA, so any help is appreciated.

Thanks.