Control built-in MacBook Pro Speakers with keyboard while using alternate sound output

Is there any way to control my built-in MacBook Pro Speakers with the keyboard sound controls (F10, F11, F12) while using an alternate device for sound output? I am using HDMI/DisplayPort speakers for sound output while using my built-in MacBook Pro Speakers specifically for Zoom (you can specify the output speakers in Zoom's preferences) and would like to adjust the built-in speaker's volume with the keyboard. I've played around with eqMac and have looked at alternates like SoundFlower but haven't found a solution.