Delete all times less than a specified value

This is probably a simple question however I am new to R and couldn't find an answer (or was googling the wrong thing). I am currently working on a project which involves deleting all Time values that are less than 5 minutes. An example of the data is as follows with the times created using the "lubridate" package.

Time
19S
1M 24S
7M 53S
11M 6S
.
.
.

Now I wish to delete all values which are less than 5 minutes. Therefore the final dataset I wish to get is:

Time
7M 53S
11M 6S
.
.
.

Any help would be amazing! Thanks!