Not familiar with Talend, but if you are making one callout every 5 mins with it, you should be completely fine from an API limit standpoint, depending on the edition of Salesforce you are on and what other API callouts you are making in your org.
You should review the Salesforce Api limitations here: https://developer.salesforce.com/docs/atlas.en-us.salesforce_app_limits_cheatsheet.meta/salesforce_app_limits_cheatsheet/salesforce_app_limits_platform_api.htm
I can't speak for your org specifically, but based on the documentation here is an example scenario. If you're on Enterprise edition with 100 Salesforce licenses, that gives you a total of 115,000 api calls per 24 hours. Since your Talend callouts would be, hypothetically, one callout every 5 minutes, then you would end up with 12 per minute, or 288 per 24 hours, well below the api limit. But again, this is just an example scenario as I do not know your org edition or what licenses you have in your org, so you will have to look at the chart and calculate the actual numbers for your org. I also don't know what other api callouts or requests are being made in your org, so those will also hit your api limits as well.