Making slider responsive

Link to preview:
https://preview.webflow.com/preview/91-developments-2?utm_medium=preview_link&utm_source=designer&utm_content=91-developments-2&preview=dc11c3cc3719ef3810eb725556fd3f6e&workflow=preview

Hi guys, I’ve looked at numerous forums with similar issues but can’t seem to resolve mine.

I would like my slider to be 550 in height when at the smallest desktop screen, so no grey area but expand to fill the page when at full resolution.