Hisense TV - need remote codes for volume

Hi all....I've searched the forum and can't find an answer. Anyone have a good remote code for a new Hisense TV?

Tivo Roamio suggests 0374,0376, and 0387 for controlling a Hisense TV. All 3 control on/off just fine, but no volume control.

Surely there is a code that also controls the volume. That's basic stuff.

Purchasing a Tivo Learning remote is not an acceptable answer to me (yet). I already have a Logitech Harmony.....but wife and family still prefer the standard Tivo remote.

Hisense TV - need remote codes for volume